Vapor hood for size box



Aug. 4, 1959 G. L. BALL ET AL .VAPOR HOOD FOR SIZE BOX 2 Sheets-Sheet 1 Filed Jan. 5, 1956 IN V EN TORS CAM 5 LAM/4R BALL y JACK HAM/QZCK v /UJ'OR/VICY a al;

Aug. 4, 1959 G. BALL ETA L VAPOR HOOD FOR sxzs BOX Filed 5, 1956 2 Sheets-Sheet 2 Hi y 1N VEN TORS L M 5 1 MM I MR f d LA A S A K %& G V: B

2,897,575 VAPOR noon non srzn BOX Gaines Lamar Ball and Jack Hamrick, West Point, Ga, assignors to the Batson-Cook Company, West Point, Ga., a corporation of Georgia Application January 5, 1956, Serial No. 557,504

6 Claims. (Cl. 2828) This invention relates to size boxes of yarn slashers, and is particularly concerned with hoods and closures for the conventionally open top of such boxes.

As is well known to those skilled in this particular \art, the function of the size box is to deposit upon the yarn passing therethrough a protective sizing of starch, glue or the like, an important function of which is to protect the yarn threads against undue wear, mutilation or breaking as they are subjected to the strenuous frictional wear during the weaving. The vat of the size box provides a source of sizing liquid which is maintained at an elevated temperature so as to insure adequate fluidity thereof to facilitate the uniform coating of the threads as they pass rapidly therethrough to the drier units of the slasher. In conventional practice, the size box containing its guide rollers, immersion rollers and squeeze rollers is of open topped construction, the rollers being thus exposed to the atmosphere. Since the required heat is such as to vaporize at least some of the size material, such vapors rise from the box to the surrounding air. Such vapors are frequently objectionable, and, therefore, an exhaust hood is frequently placed over the box to withdraw such vapors. Obviously, this procedure is wasteful in the loss of size material through evaporation; and, furthermore, the open exposed top of the size box renders the heating operation inefficient. In addition, air currents at times coagulate the size material particularly on the squeeze roller and thus mitigate against uniform sizing operations.

It is therefore among the objects of the present invention to provide an enclosure or hood for the size box of a slasher in order to conserve the size material, pneclude deterioration thereof through exposure to ambient temperatures and to increase the efiiciency of the heating of the size material.

Another object of the invention is to provide a closure for the size box of a slasher including means to prevent the deposition of condensed water vapor upon yarn being delivered from the size box after passage from the squeeze roller.

It is also an object of the present invention to provide a vapor hood for a size box so constructed and arranged as to protect and house the size applicator roll and squeeze roll in such manner as to provide for the return of condensed size vapor to the box.

Another object of the present invention is to provide a novel and improved vapor hood which may be conveniently tilted for giving access to the size box as may berequired in the original threading of the yarn through the box.

A further object of the present invention is to provide a hooded size box including an inspection opening by which the operation of the internal mechanism of the box may be readily observed during operation and without necessity for removal or pivotal movement of the primary hood.

The objects of the invention also include that of providing for an independent auxiliary inspection hood which 2 may be readily manipulated to provide ample inspection for the internal mechanism of the box without displacement of the primary vapor hood by which the main area of the box is enclosed.

Further objects, features and advantages of the present invention will be apparent from a consideration of the following specification taken in conjunction with the accompanying drawings in which:

Fig. 1 is a perspective view of one preferred form of the present invention. 1

Fig. 2 is a fragmentary side elevation of that form of the invention presented in Fig. 1.

Fig. 3 is a detail cross-sectional view showing the. pivotal mounting of the primary hood of the present invention.

Fig. 4 is a transverse vertical cross-section taken on the line 44 of Fig. l.

Fig. 5 is a detail fragmentary front elevation of the auxiliary inspection hood. V 7

While various aspects of the present inventive concept may be embodied in numerous varieties of structural forms, that arrangement here presented by way of ex ample may be broadly characterized as comprising a pivotally mounted primary hood having an arcuate upper surface arranged when closed to be in vertical spaced parallel relation above the squeeze roll of the size box.

An important feature of the invention lies in the ;pro vision of a receiving trough at the side of the hood arranged in such manner as to provide for the accumulation of condensed water vapor and for discharge thereof into thesize box at the sides thereof, thus precluding the discharge of such condensed material on the yarn, particularly after the yarn has passed from the squeeze roller.

Another important feature is the provision of heating means for that portion of the hood directly over the flights of yarn leaving the squeeze roll, thus precluding condensation in this area and consequent disposition in the threads.

The mounting of the hood is independent of thesize vat and is arranged for a balancing thereof such that the hood may be readily raised and retained .in'raisedposition after passage over a dead center position. The invention also provides an observation opening at the forward edge of the hood; and, if desired, anauxiliary inspection hood may be provided to normally close the, observation opening. Such auxiliary hood is also mounted independently of the vat and is arranged as to be readily tilted to provide observation 'without movement of the primary hood and without any interference with the continued operation of the box.

Referring more particularly to the drawings, the C011? ventional structure to which the hood of the present invention is applied includes the size material vat 10 mounted within and supported by a generally rectangular framework or housing 11. The vat It is here presented as of usual open top construction being provided with a peripheral supporting flange 12. Adjacent the upper edge of the rear or entry wall 13 of the vat, an entry guide roll 14 is mounted over which the threads ofyarn are passed to enter the vat passing from the roller 14 under no part of the present invention and that the rep-resenta-- tions above referred to are of conventional structure and that the invention is not limited nor confinedv to such construction and arrangement. The present invention includes a main or primary hood member preferably formed of sheet metal and including It will be understood that the structure and' a forwardly inclined flat front or discharge side area 20 merging rearwardly into an arcuate top 21 which in turn merges rearwardly into an entry side rear vertical wall 22. The. bottom edge of the wall 22 is formed with an inwardly extending horizontal flange 23. terminating in upwardly and forwardly directed lip 24 by which a trough is formed at the entry side of the hood extending transversely to receive and guide condensed water vapor to the sides of the vat where it may be discharged without falling upon the yarn. At the opposite discharge edge, the hood area 20 is curved about a transversely extending tubular pivot bar indicated at 25, to which the hood may be secured as by solder or welding. The tube 25 extends beyond the sides of the hood to receive internally threaded tubular bearing nipples 27. The primary hood is thus pivotally supported by the nipples 27 which are received within bearing boxes 28 mounted in vertical standards 29 secured to the sides of housing 11. It will be noted that the vertical standards 29 support the tubular pivot bar 25 above the upper edge of the housing 11 and the flange 12, thus providing a space for the discharge of the threads of yarn as indicated at 19. As indicated in Fig. 3, the tubularmember 25 may receive'therein an electrical heating element 30 so that condensed water vapor which may tendto flow forwardly from the portion 21 of the hood towards the delivery side thereof will be revaporized upon reaching the vicinity of member 25 and thus no condensate will drip from the discharge side of the hood upon the portion 19 of the yarn after the yarn has passed from the squeeez rolls 17 and 18. While an electrical heating element is here depicted, it will be observed. that the tubular character of the nipples 27 lend themselves to receiving steam heating tubes, if preferred.

As indicated at 31, the hood is provided with downwardly directed side walls corresponding generally to the curvature of the body of the hood and being so arranged as to clean, when the hood is lowered, the shaft 32 of vatecl temperature and whereby excessive evaporation is thus precluded, it may be desirable to provide further enclosure of the entry open top of the vat. Thus, in the present invention, a pair of oppositely disposed standards 40 are provided from which inwardly extending pivot pintles 41 mount a secondary or auxiliary pivoted closure. In its present form the auxiliary closure or hood includes a plate 42 having a forwardly and downwardly inclined wall 43 terminating in a trough flange 44 by which condensate passing down the interface of the wall 43 will be directed to the sides of the vat where it may drop without passing to the yarn as it moves over the guide rolls 15 and 16. For sealing between the primary hood and the auxiliary hood there is provided a rubber or fabric seal 46 carried by the edge of the portion 22 of the primary hood to bear against the lower edge of the inclined surface 43 of the auxiliary hood. It will be noted that the auxiliary hood is supported on the pintles 41 which enter within slots 47 of the sides 48 of the auxiliary hood and thus the hood is pivotally mounted to permit free tilting movement thereof to facilitate inspection between the wall 22 of the main hood and the end wall 43 of the auxiliary hood when the hood is tilted in clockwise direction.

For normally maintaining the auxiliary hood in the horizontal position shown, the side walls 48 are provided with outwardly inclined flanges 49, the forward edges of which are adapted to bear against the rear edge of the standards 40 to maintain the hood normally in the horizontal position shown. I

From the foregoing, it is believed that the construction and operation of both the primary and auxiliary hoods will be amply understood. It is of course to be understood that the invention is not limited nor confined to the the upper squeeze roll 18. It will also be seen that the side walls of the hood extend outwardly as at 31' above and beyond the portion 20 of the hood and the pivoted edge thereof. Extending inwardly from the forward extensions 31 of the sides, there are provided pins 33 which receive vertical spring members 34 adapted to tension the hood and counter-balance the weight thereof so as to facilitate pivotal movement from closed position as shown by the full lines of the figures to a vertical open position as indicatedby the dotted linesf The pins 33 further serveas the stop members for limiting both closed and openposition of the hood. When in closed position, the pin 33 will bear against the outer face of the standard 29 above the pivot tube of the hood, thus supporting the hood in the horizontal closed position. As the hood is raised, however, with the assistance of the spring 34, the pin will move arcuately outwardly and downwardly past the plane of the tube and will come to rest against the standard 29 below the plane of the tube, thus supporting the hood in its vertical open position. By this arrangement the hood is supported in cantilever fashion independently of the vat. The spring and the pins'are protected and enclosed by a forwardly extending vertical housing 35 mounted upon the forward face of the standards 29. The lower end of the spring 34 is secured by studs 36 extending inwardly from the standard. On the sides of the housing 11, vertical baflies 26 are mounted to stand closely adjacent but outwardly parallel and spaced from the side walls 31 of the hood when the hood is closed.

In that form of the invention herein presented, it will be noted that the rear vertical wall 22 of the hood is located, when the hood is in closed position, on a vertical plane substantiallyparallel with the immersion roll 16, thus leaving the rear entry area of the vat exposed. While such exposure facilitates inspection of the operation of the size box and while the protection of the squeeze rolls by which they are maintained i l 95 iq of exact structural details and the configurations of the hoods herein presented. However, it will be seen that the present invention provides a readily tiltable protective primary hood surrounding the squeeze rolls of a conventional size box and so configured as to provide an enclosure therefor by which evaporation is restrained, the rolls are protected against cooling atmospheric contact which would cause coagulation of the size material precluding an even distribution thereof. It will also be noted that this hood provides means to preclude undue evaporation and fur ther provides for the return of condensed water vapor, as well as insuring the absence of condensation above the discharge flight of the yarn. The pivotal mounting of the hood is such that the support of the hood is, while in both open and closed position, provided by the contact of the studs 33 with the standard 29 and thus the hood is not in contact with or supported by the walls of the box itself. It will be also noted that the assembly may include the forward independently pivoted auxiliary hood so arranged as to be readily tilted to permit inspection of the operations of the size box. In the .practice of the invention, numerous changes, modifications and the full use of equivalents may be resorted to without departure from the spirit or scope thereof as outlined in the appended claims;

We claim: 7

1. An enclosure for the open top of a size vat including a generally arcuate hood extending when closed over only a portion of said top and including therein a heater adjacent one edge on a gently sloping portion of said hood for precluding the discharge of condensate from said edge, a trough adjacent an opposed edge on an upright portion of said hood for delivering condensate from the sides of said opposed edge, means for pivotally mounting said hood independently of said vat for bodily movement about an axis at the forward edge thereof adjacent said heater, an auxiliary hood adapted when closed to cover the remaining area of said open top, and means for pivotally mounting said auxiliary hood independently of said vat for pivotal movement on an axis substantially central thereof.

2. An enclosure for the open top of a size vat including a hood, a tubular pivot bar pivotally mounting said hood for disposition over a size vat, and a heating element mounted in said tubular bar.

3. An enclosure for the open top of a size vat including a generally arcuate hood, a tubular pivot bar pivotally mounting one edge of said hood so that said hood may be moved over a size vat, and a heating element mounted in said tubular bar.

4. An enclosure for the open top of a size vat including a hood, a tubular pivot bar formed along the pivoted edge of said hood pivotally mounting said hood for disposition over a size vat, a heating element in said tubular bar, and a condensate guide trough on said hood at one edge thereof opposite the pivoted edge thereof.

5. An enclosure for the open top of a size vat including a generally arcuate hood, a tubular pivot bar pivotally mounting said hood over a size vat, a heating element mounted in said tubular bar, and spring means for retaining said hood in open or closed position.

6. An enclosure for the open top of a size vat includ ing a generally arcuate hood, a tubular pivot bar formed along the pivoted edge of said hood pivotally mounting said hood over a size vat, a heating element mounted in said tubular bar, a condensate guide trough at an edge of said hood, opposite the pivoted edge of said hood, and spring means for retaining said hood in open or closed position.

References Cited in the file of this patent UNITED STATES PATENTS 

